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Percentage of patients that gain or lost one line of corrected distance visual acuity (CDVA) 6 months after intracorneal ring segment implantation
| Keratoconus | Success CDVA (%) | Failure CDVA (%) |
|---|---|---|
| Grade I | 13.5 | 51.0 |
| Grade II | 49.4 | 29.8 |
| Grade III | 54.0 | 18.9 |
| Grade IV | 81.3 | 9.3 |
| Grade Plus | 85.1 | 11.1 |
